I put a pop pop toy bath in my real bath. In response to a comment by сергей величько on my video Pop Pop Mackerel tin boat in the bath /watch/KH3SARFwFQXMqkL457m0M2BrSRPx2a5ALP=tsil?YUPa7goaLxFaS
Long video /watch/cNaM53UGw9iGM
Main Components
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Aluminium tube
Plastic toy bath
Candle or tea light
BluTack
Silicon tube
Hot glue
Some history on Pop Pop boats you look at this Wikipedia link on the subject http://en.wikipedia.org/wiki/Pop_pop_boat they have been around since at least 1891 when a patent was filed by a Frenchman named Thomas Piot.
Steve Mould's excellent "explainer" video - Pop-Pop Boats Are Weirder Than You Think /watch/g-Eo7cpuXA3uo
OLD explanation on HOW DOES IT WORK?
Water in the boiler is turned to steam. The steam has a greater volume than the water so it pushes out of the boiler and down the tube. In the tube it cools, condenses and contracts so it is drawn back into the boiler and the process repeats. The action of the steam pushing into the tube pushes the existing water in the tube out the back and that drives the boat forwards. The steam condensing and contracting draws water back into the tube ready for the next push.
If your next question is "why doesn't the boat oscillate backwards and forwards due to this push-pull effect?" try blowing a candle out and then try sucking a candle out and you will see the blow is fairly directional but the suck is not.
Daryl Foster devotes his channel to Putt Putt boats and here is the first one on his channel also back in 2009 /watch/Ue6tifwhzT4ht
Pop Pop boats playlist /playlist/PLA5a2xPRSrB2M0m754LkqMXQFwFRAS3HK
RC Pop Pop boats /playlist/PL-by_jO_6em9N_D_NRdDPmEaSxPDNzbZr
Toy Boats playlist /playlist/PLA5a2xPRSrB24vUS9E8zkSgjZysEL00zr
Here is the link to DaveHax tutorial which I found excellent /watch/41g8atK9ik098
sciencetoymaker has a full step by step tutorial series on putt putt (pop pop) boats starting in January 2009 with episode 1 here /watch/MxAurjm0FZ20u
Here is a good video on tweaking the speed of these boats /watch/g4e97KSbs2Pb9
This link that explains the general annealing process without getting too technical http://steamshed.com/annealing% 20process.html and here is a YouTube video on the subject by George Goehl /watch/AM8zl11zSj3zz
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